microencephaly
/ˌmʌɪkrəʊɛnˈsɛfəli/ /ˌmʌɪkrəʊɛnˈkɛfəli/(also micrencephaly) Medicine
noun
The condition of having a small brain (often associated with microcephaly).
Origin
Late 19th century; earliest use found in The New Sydenham Society's Lexicon of Medicine and the Allied Sciences. From micro- + -encephaly, after slightly earlier micrencephalia.